The current service doesn't play too nice with Sway when it is started
from [sway service](https://github.com/xdbob/sway-services).
Waybar is started before the system has a display.
```
Nov 30 22:11:23 ansan waybar[1352]: Unable to init server: Could not
connect: Connection refused
Nov 30 22:11:23 ansan waybar[1352]: cannot open display:
Nov 30 22:11:23 ansan systemd[1306]: waybar.service: Main process
exited, code=exited, status=1/FAILURE
Nov 30 22:11:23 ansan systemd[1306]: waybar.service: Failed with result
'exit-code'.
```
Restarting the service after the system has been initialized works nicely,
so this restart rule should do the trick without tinkering with the
target.
Currently, the bottom border on workspace buttons eats into the box size
and causes the text to sit higher than in other modules. This is ugly
when there are other modules (like the window title) right next to the
workspace module. To fix the issue, create the bottom border using an
inset box-shadow, which doesn't affect the box's content sizing.
In the default style.css many modules (clock, battery, cpu, ...) get horizontal padding, but mpd module does not. This commit adds mpd to the list of modules that get the padding.
add a systemd --user unit/service file, so that one can run waybar as a
--user systemd service. when the service is enabled, Waybar will start
when the wayland-session.target is started.
this feature is automatically enabled if systemd is found, but can be disabled
with -Dsystemd=disabled
Because of CSS specificity rules, the `#custom-media` style will always override the `custom-spotify` and `custom-vlc` styles, so the background of the media element is always green rather than sometimes orange when VLC is running. I added `#custom-media` in front of each of the class selectors to increase their specificity so they take precedence.
